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Write the Sum Using Sigma Notation 112+123+134++19991000\frac { 1 } { 1 \cdot 2 } + \frac { 1 } { 2 \cdot 3 } + \frac { 1 } { 3 \cdot 4 } + \ldots + \frac { 1 } { 999 \cdot 1000 }

Question 26

Multiple Choice

Write the sum using sigma notation. 112+123+134++19991000\frac { 1 } { 1 \cdot 2 } + \frac { 1 } { 2 \cdot 3 } + \frac { 1 } { 3 \cdot 4 } + \ldots + \frac { 1 } { 999 \cdot 1000 }


A) n=110001n(n+1) \sum _ { n = 1 } ^ { 1000 } \frac { 1 } { n ( n + 1 ) }
B) n=110001n(n1) \sum _ { n = 1 } ^ { 1000 } \frac { 1 } { n ( n - 1 ) }
C) n=19991n(n+1) \sum _ { n = 1 } ^ { 999 } \frac { 1 } { n ( n + 1 ) }
D) n=110011n(n+1) \sum _ { n = 1 } ^ { 1001 } \frac { 1 } { n ( n + 1 ) }
E) n=19991n(n1) \sum _ { n = 1 } ^ { 999 } \frac { 1 } { n ( n - 1 ) }

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